43341922 |
1 | /* |
2 | * PDF backend for Halibut |
3 | */ |
4 | |
5 | #include <assert.h> |
6 | #include "halibut.h" |
7 | #include "paper.h" |
8 | |
9 | #define TREE_BRANCH 2 /* max branching factor in page tree */ |
10 | |
11 | paragraph *pdf_config_filename(char *filename) |
12 | { |
e4ea58f8 |
13 | return cmdline_cfg_simple("pdf-filename", filename, NULL); |
43341922 |
14 | } |
15 | |
16 | typedef struct object_Tag object; |
17 | typedef struct objlist_Tag objlist; |
18 | |
19 | struct object_Tag { |
20 | objlist *list; |
21 | object *next; |
22 | int number; |
23 | rdstringc main, stream; |
24 | int size, fileoff; |
25 | char *final; |
26 | }; |
27 | |
28 | struct objlist_Tag { |
29 | int number; |
30 | object *head, *tail; |
31 | }; |
32 | |
33 | static object *new_object(objlist *list); |
34 | static void objtext(object *o, char const *text); |
35 | static void objstream(object *o, char const *text); |
7c8c4239 |
36 | static void pdf_string(void (*add)(object *, char const *), |
37 | object *, char const *); |
ce1b04aa |
38 | static void pdf_string_len(void (*add)(object *, char const *), |
39 | object *, char const *, int); |
43341922 |
40 | static void objref(object *o, object *dest); |
993ade7a |
41 | static char *pdf_outline_convert(wchar_t *s, int *len); |
43341922 |
42 | |
43 | static void make_pages_node(object *node, object *parent, page_data *first, |
2ff8419e |
44 | page_data *last, object *resources, |
45 | object *mediabox); |
f0e51ce1 |
46 | static int make_outline(object *parent, outline_element *start, int n, |
47 | int open); |
09358aa7 |
48 | static int pdf_versionid(FILE *fp, word *words); |
43341922 |
49 | |
50 | void pdf_backend(paragraph *sourceform, keywordlist *keywords, |
51 | indexdata *idx, void *vdoc) { |
52 | document *doc = (document *)vdoc; |
53 | int font_index; |
54 | font_encoding *fe; |
55 | page_data *page; |
56 | int pageno; |
57 | FILE *fp; |
58 | char *filename; |
59 | paragraph *p; |
60 | objlist olist; |
993ade7a |
61 | object *o, *info, *cat, *outlines, *pages, *resources, *mediabox; |
43341922 |
62 | int fileoff; |
63 | |
64 | IGNORE(keywords); |
65 | IGNORE(idx); |
66 | |
67 | filename = dupstr("output.pdf"); |
68 | for (p = sourceform; p; p = p->next) { |
7738a2fb |
69 | if (p->type == para_Config) { |
43341922 |
70 | if (!ustricmp(p->keyword, L"pdf-filename")) { |
71 | sfree(filename); |
e4ea58f8 |
72 | filename = dupstr(adv(p->origkeyword)); |
43341922 |
73 | } |
74 | } |
75 | } |
76 | |
77 | olist.head = olist.tail = NULL; |
78 | olist.number = 1; |
79 | |
993ade7a |
80 | { |
81 | char buf[256]; |
82 | |
83 | info = new_object(&olist); |
84 | objtext(info, "<<\n"); |
85 | if (doc->n_outline_elements > 0) { |
86 | char *title; |
87 | int titlelen; |
88 | |
89 | title = |
90 | pdf_outline_convert(doc->outline_elements->pdata->outline_title, |
91 | &titlelen); |
92 | objtext(info, "/Title "); |
93 | pdf_string_len(objtext, info, title, titlelen); |
94 | sfree(title); |
95 | objtext(info, "\n"); |
96 | } |
97 | objtext(info, "/Producer "); |
98 | sprintf(buf, "Halibut, %s", version); |
99 | pdf_string(objtext, info, buf); |
100 | objtext(info, "\n>>\n"); |
101 | } |
102 | |
43341922 |
103 | cat = new_object(&olist); |
a615a778 |
104 | if (doc->n_outline_elements > 0) |
105 | outlines = new_object(&olist); |
106 | else |
107 | outlines = NULL; |
43341922 |
108 | pages = new_object(&olist); |
109 | resources = new_object(&olist); |
110 | |
111 | /* |
43341922 |
112 | * The catalogue just contains references to the outlines and |
113 | * pages objects. |
114 | */ |
a615a778 |
115 | objtext(cat, "<<\n/Type /Catalog"); |
116 | if (outlines) { |
117 | objtext(cat, "\n/Outlines "); |
118 | objref(cat, outlines); |
119 | } |
43341922 |
120 | objtext(cat, "\n/Pages "); |
121 | objref(cat, pages); |
a615a778 |
122 | if (outlines) |
123 | objtext(cat, "\n/PageMode /UseOutlines"); |
124 | objtext(cat, "\n>>\n"); |
43341922 |
125 | |
126 | /* |
127 | * Set up the resources dictionary, which mostly means |
128 | * providing all the font objects and names to call them by. |
129 | */ |
130 | font_index = 0; |
131 | objtext(resources, "<<\n/Font <<\n"); |
132 | for (fe = doc->fonts->head; fe; fe = fe->next) { |
133 | char fname[40]; |
134 | int i; |
135 | object *font; |
136 | |
137 | sprintf(fname, "f%d", font_index++); |
138 | fe->name = dupstr(fname); |
139 | |
140 | font = new_object(&olist); |
141 | |
142 | objtext(resources, "/"); |
143 | objtext(resources, fe->name); |
144 | objtext(resources, " "); |
145 | objref(resources, font); |
146 | objtext(resources, "\n"); |
147 | |
148 | objtext(font, "<<\n/Type /Font\n/Subtype /Type1\n/Name /"); |
149 | objtext(font, fe->name); |
150 | objtext(font, "\n/BaseFont /"); |
ba0fe3ec |
151 | objtext(font, fe->font->info->name); |
43341922 |
152 | objtext(font, "\n/Encoding <<\n/Type /Encoding\n/Differences ["); |
153 | |
154 | for (i = 0; i < 256; i++) { |
155 | char buf[20]; |
156 | if (!fe->vector[i]) |
157 | continue; |
158 | sprintf(buf, "\n%d /", i); |
159 | objtext(font, buf); |
160 | objtext(font, fe->vector[i] ? fe->vector[i] : ".notdef"); |
161 | } |
162 | |
163 | objtext(font, "\n]\n>>\n"); |
164 | |
165 | { |
166 | object *widths = new_object(&olist); |
9fb062fc |
167 | int firstchar = -1, lastchar = -1; |
168 | char buf[80]; |
169 | for (i = 0; i < 256; i++) |
170 | if (fe->indices[i] >= 0) { |
171 | if (firstchar < 0) firstchar = i; |
172 | lastchar = i; |
173 | } |
174 | sprintf(buf, "/FirstChar %d\n/LastChar %d\n/Widths ", |
175 | firstchar, lastchar); |
176 | objtext(font, buf); |
43341922 |
177 | objref(font, widths); |
178 | objtext(font, "\n"); |
179 | objtext(widths, "[\n"); |
9fb062fc |
180 | for (i = firstchar; i <= lastchar; i++) { |
43341922 |
181 | char buf[80]; |
182 | double width; |
183 | if (fe->indices[i] < 0) |
184 | width = 0.0; |
185 | else |
ba0fe3ec |
186 | width = fe->font->info->widths[fe->indices[i]]; |
17c71b41 |
187 | sprintf(buf, "%g\n", 1000.0 * width / FUNITS_PER_PT); |
43341922 |
188 | objtext(widths, buf); |
189 | } |
190 | objtext(widths, "]\n"); |
191 | } |
192 | |
193 | objtext(font, ">>\n"); |
194 | } |
195 | objtext(resources, ">>\n>>\n"); |
196 | |
2ff8419e |
197 | { |
198 | char buf[255]; |
199 | mediabox = new_object(&olist); |
200 | sprintf(buf, "[0 0 %g %g]\n", |
201 | doc->paper_width / FUNITS_PER_PT, |
202 | doc->paper_height / FUNITS_PER_PT); |
203 | objtext(mediabox, buf); |
204 | } |
205 | |
43341922 |
206 | /* |
207 | * Define the page objects for each page, and get each one |
208 | * ready to have a `Parent' specification added to it. |
209 | */ |
210 | for (page = doc->pages; page; page = page->next) { |
211 | object *opage; |
212 | |
213 | opage = new_object(&olist); |
214 | page->spare = opage; |
215 | objtext(opage, "<<\n/Type /Page\n"); |
216 | } |
217 | |
218 | /* |
219 | * Recursively build the page tree. |
220 | */ |
2ff8419e |
221 | make_pages_node(pages, NULL, doc->pages, NULL, resources, mediabox); |
43341922 |
222 | |
223 | /* |
224 | * Create and render the individual pages. |
225 | */ |
226 | pageno = 0; |
227 | for (page = doc->pages; page; page = page->next) { |
228 | object *opage, *cstr; |
23765aeb |
229 | rect *r; |
7c8c4239 |
230 | text_fragment *frag, *frag_end; |
43341922 |
231 | char buf[256]; |
7c8c4239 |
232 | int x, y, lx, ly; |
43341922 |
233 | |
234 | opage = (object *)page->spare; |
235 | /* |
236 | * At this point the page dictionary is already |
237 | * half-written, with /Type and /Parent already present. We |
238 | * continue from there. |
239 | */ |
240 | |
241 | /* |
242 | * The PDF spec says /Resources is required, but also says |
243 | * that it's inheritable and may be omitted if it's present |
244 | * in a Pages node. In our case it is: it's present in the |
245 | * topmost /Pages node because we carefully put it there. |
2ff8419e |
246 | * So we don't need a /Resources entry here. The same applies |
247 | * to /MediaBox. |
43341922 |
248 | */ |
43341922 |
249 | |
250 | /* |
251 | * Now we're ready to define a content stream containing |
252 | * the actual text on the page. |
253 | */ |
254 | cstr = new_object(&olist); |
255 | objtext(opage, "/Contents "); |
256 | objref(opage, cstr); |
257 | objtext(opage, "\n"); |
258 | |
23765aeb |
259 | /* |
260 | * Render any rectangles on the page. |
261 | */ |
262 | for (r = page->first_rect; r; r = r->next) { |
263 | char buf[512]; |
17c71b41 |
264 | sprintf(buf, "%g %g %g %g re f\n", |
265 | r->x / FUNITS_PER_PT, r->y / FUNITS_PER_PT, |
266 | r->w / FUNITS_PER_PT, r->h / FUNITS_PER_PT); |
23765aeb |
267 | objstream(cstr, buf); |
268 | } |
269 | |
43341922 |
270 | objstream(cstr, "BT\n"); |
43341922 |
271 | |
7c8c4239 |
272 | /* |
273 | * PDF tracks two separate current positions: the position |
274 | * given in the `line matrix' and the position given in the |
275 | * `text matrix'. We must therefore track both as well. |
276 | * They start off at -1 (unset). |
277 | */ |
278 | lx = ly = -1; |
279 | x = y = -1; |
280 | |
281 | frag = page->first_text; |
282 | while (frag) { |
283 | /* |
284 | * For compactness, I'm going to group text fragments |
285 | * into subsequences that use the same font+size. So |
286 | * first find the end of this subsequence. |
287 | */ |
288 | for (frag_end = frag; |
289 | (frag_end && |
290 | frag_end->fe == frag->fe && |
291 | frag_end->fontsize == frag->fontsize); |
292 | frag_end = frag_end->next); |
293 | |
294 | /* |
295 | * Now select the text fragment, and prepare to display |
296 | * the text. |
297 | */ |
43341922 |
298 | objstream(cstr, "/"); |
299 | objstream(cstr, frag->fe->name); |
7c8c4239 |
300 | sprintf(buf, " %d Tf ", frag->fontsize); |
43341922 |
301 | objstream(cstr, buf); |
302 | |
7c8c4239 |
303 | while (frag && frag != frag_end) { |
304 | /* |
305 | * Place the text position for the first piece of |
306 | * text. |
307 | */ |
308 | if (lx < 0) { |
309 | sprintf(buf, "1 0 0 1 %g %g Tm ", |
17c71b41 |
310 | frag->x/FUNITS_PER_PT, frag->y/FUNITS_PER_PT); |
7c8c4239 |
311 | } else { |
312 | sprintf(buf, "%g %g Td ", |
17c71b41 |
313 | (frag->x - lx)/FUNITS_PER_PT, |
314 | (frag->y - ly)/FUNITS_PER_PT); |
7c8c4239 |
315 | } |
43341922 |
316 | objstream(cstr, buf); |
7c8c4239 |
317 | lx = x = frag->x; |
318 | ly = y = frag->y; |
319 | |
320 | /* |
321 | * See if we're going to use Tj (show a single |
322 | * string) or TJ (show an array of strings with |
323 | * x-spacings between them). We determine this by |
324 | * seeing if there's more than one text fragment in |
325 | * sequence with the same y-coordinate. |
326 | */ |
327 | if (frag->next && frag->next != frag_end && |
328 | frag->next->y == y) { |
329 | /* |
330 | * The TJ strategy. |
331 | */ |
332 | objstream(cstr, "["); |
333 | while (frag && frag != frag_end && frag->y == y) { |
334 | if (frag->x != x) { |
335 | sprintf(buf, "%g", |
336 | (x - frag->x) * 1000.0 / |
17c71b41 |
337 | (FUNITS_PER_PT * frag->fontsize)); |
7c8c4239 |
338 | objstream(cstr, buf); |
339 | } |
340 | pdf_string(objstream, cstr, frag->text); |
341 | x = frag->x + frag->width; |
342 | frag = frag->next; |
343 | } |
344 | objstream(cstr, "]TJ\n"); |
345 | } else |
346 | { |
347 | /* |
348 | * The Tj strategy. |
349 | */ |
350 | pdf_string(objstream, cstr, frag->text); |
351 | objstream(cstr, "Tj\n"); |
352 | frag = frag->next; |
353 | } |
43341922 |
354 | } |
43341922 |
355 | } |
356 | objstream(cstr, "ET"); |
357 | |
138d7ffb |
358 | /* |
359 | * Also, we want an annotation dictionary containing the |
360 | * cross-references from this page. |
361 | */ |
362 | if (page->first_xref) { |
363 | xref *xr; |
364 | objtext(opage, "/Annots [\n"); |
365 | |
366 | for (xr = page->first_xref; xr; xr = xr->next) { |
367 | object *annot; |
368 | char buf[256]; |
369 | |
370 | annot = new_object(&olist); |
371 | objref(opage, annot); |
372 | objtext(opage, "\n"); |
373 | |
374 | objtext(annot, "<<\n/Type /Annot\n/Subtype /Link\n/Rect ["); |
375 | sprintf(buf, "%g %g %g %g", |
17c71b41 |
376 | xr->lx / FUNITS_PER_PT, xr->by / FUNITS_PER_PT, |
377 | xr->rx / FUNITS_PER_PT, xr->ty / FUNITS_PER_PT); |
138d7ffb |
378 | objtext(annot, buf); |
379 | objtext(annot, "]\n/Border [0 0 0]\n"); |
380 | |
381 | if (xr->dest.type == PAGE) { |
382 | objtext(annot, "/Dest ["); |
383 | objref(annot, (object *)xr->dest.page->spare); |
384 | objtext(annot, " /XYZ null null null]\n"); |
385 | } else { |
7c8c4239 |
386 | objtext(annot, "/A <<\n/Type /Action\n/S /URI\n/URI "); |
387 | pdf_string(objtext, annot, xr->dest.url); |
388 | objtext(annot, "\n>>\n"); |
138d7ffb |
389 | } |
390 | |
391 | objtext(annot, ">>\n"); |
392 | } |
393 | |
394 | objtext(opage, "]\n"); |
395 | } |
396 | |
43341922 |
397 | objtext(opage, ">>\n"); |
398 | } |
399 | |
400 | /* |
f0e51ce1 |
401 | * Set up the outlines dictionary. |
402 | */ |
a615a778 |
403 | if (outlines) { |
f0e51ce1 |
404 | int topcount; |
405 | char buf[80]; |
406 | |
407 | objtext(outlines, "<<\n/Type /Outlines\n"); |
408 | topcount = make_outline(outlines, doc->outline_elements, |
409 | doc->n_outline_elements, TRUE); |
410 | sprintf(buf, "/Count %d\n>>\n", topcount); |
411 | objtext(outlines, buf); |
412 | } |
413 | |
414 | /* |
43341922 |
415 | * Assemble the final linear form of every object. |
416 | */ |
417 | for (o = olist.head; o; o = o->next) { |
418 | rdstringc rs = {0, 0, NULL}; |
419 | char text[80]; |
420 | |
421 | sprintf(text, "%d 0 obj\n", o->number); |
422 | rdaddsc(&rs, text); |
423 | |
424 | if (!o->main.text && o->stream.text) { |
425 | sprintf(text, "<<\n/Length %d\n>>\n", o->stream.pos); |
426 | rdaddsc(&o->main, text); |
427 | } |
428 | |
429 | assert(o->main.text); |
430 | rdaddsc(&rs, o->main.text); |
431 | sfree(o->main.text); |
432 | |
433 | if (rs.text[rs.pos-1] != '\n') |
434 | rdaddc(&rs, '\n'); |
435 | |
436 | if (o->stream.text) { |
437 | /* |
438 | * FIXME: If we ever start compressing stream data then |
439 | * it will have zero bytes in it, so we'll have to be |
440 | * more careful than this. |
441 | */ |
442 | rdaddsc(&rs, "stream\n"); |
443 | rdaddsc(&rs, o->stream.text); |
444 | rdaddsc(&rs, "\nendstream\n"); |
445 | sfree(o->stream.text); |
446 | } |
447 | |
448 | rdaddsc(&rs, "endobj\n"); |
449 | |
450 | o->final = rs.text; |
451 | o->size = rs.pos; |
452 | } |
453 | |
454 | /* |
455 | * Write out the PDF file. |
456 | */ |
457 | |
458 | fp = fopen(filename, "wb"); |
459 | if (!fp) { |
460 | error(err_cantopenw, filename); |
461 | return; |
462 | } |
463 | |
464 | /* |
09358aa7 |
465 | * Header. I'm going to put the version IDs in the header as |
466 | * well, simply in PDF comments. |
43341922 |
467 | */ |
468 | fileoff = fprintf(fp, "%%PDF-1.3\n"); |
09358aa7 |
469 | for (p = sourceform; p; p = p->next) |
470 | if (p->type == para_VersionID) |
471 | fileoff += pdf_versionid(fp, p->words); |
43341922 |
472 | |
473 | /* |
474 | * Body |
475 | */ |
476 | for (o = olist.head; o; o = o->next) { |
477 | o->fileoff = fileoff; |
478 | fwrite(o->final, 1, o->size, fp); |
479 | fileoff += o->size; |
480 | } |
481 | |
482 | /* |
483 | * Cross-reference table |
484 | */ |
485 | fprintf(fp, "xref\n"); |
486 | assert(olist.head->number == 1); |
487 | fprintf(fp, "0 %d\n", olist.tail->number + 1); |
488 | fprintf(fp, "0000000000 65535 f \n"); |
489 | for (o = olist.head; o; o = o->next) { |
490 | char entry[40]; |
491 | sprintf(entry, "%010d 00000 n \n", o->fileoff); |
492 | assert(strlen(entry) == 20); |
493 | fputs(entry, fp); |
494 | } |
495 | |
496 | /* |
497 | * Trailer |
498 | */ |
993ade7a |
499 | fprintf(fp, "trailer\n<<\n/Size %d\n/Root %d 0 R\n/Info %d 0 R\n>>\n", |
500 | olist.tail->number + 1, cat->number, info->number); |
43341922 |
501 | fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff); |
502 | |
503 | fclose(fp); |
504 | |
505 | sfree(filename); |
506 | } |
507 | |
508 | static object *new_object(objlist *list) |
509 | { |
f1530049 |
510 | object *obj = snew(object); |
43341922 |
511 | |
512 | obj->list = list; |
513 | |
514 | obj->main.text = NULL; |
515 | obj->main.pos = obj->main.size = 0; |
516 | obj->stream.text = NULL; |
517 | obj->stream.pos = obj->stream.size = 0; |
518 | |
519 | obj->number = list->number++; |
520 | |
521 | obj->next = NULL; |
522 | if (list->tail) |
523 | list->tail->next = obj; |
524 | else |
525 | list->head = obj; |
526 | list->tail = obj; |
527 | |
528 | obj->size = 0; |
529 | obj->final = NULL; |
530 | |
531 | return obj; |
532 | } |
533 | |
534 | static void objtext(object *o, char const *text) |
535 | { |
536 | rdaddsc(&o->main, text); |
537 | } |
538 | |
539 | static void objstream(object *o, char const *text) |
540 | { |
541 | rdaddsc(&o->stream, text); |
542 | } |
543 | |
544 | static void objref(object *o, object *dest) |
545 | { |
546 | char buf[40]; |
547 | sprintf(buf, "%d 0 R", dest->number); |
548 | rdaddsc(&o->main, buf); |
549 | } |
550 | |
551 | static void make_pages_node(object *node, object *parent, page_data *first, |
2ff8419e |
552 | page_data *last, object *resources, |
553 | object *mediabox) |
43341922 |
554 | { |
555 | int count; |
556 | page_data *page; |
557 | char buf[80]; |
558 | |
559 | objtext(node, "<<\n/Type /Pages\n"); |
560 | if (parent) { |
561 | objtext(node, "/Parent "); |
562 | objref(node, parent); |
563 | objtext(node, "\n"); |
564 | } |
565 | |
566 | /* |
567 | * Count the pages in this stretch, to see if there are few |
568 | * enough to reference directly. |
569 | */ |
570 | count = 0; |
571 | for (page = first; page; page = page->next) { |
572 | count++; |
573 | if (page == last) |
574 | break; |
575 | } |
576 | |
577 | sprintf(buf, "/Count %d\n/Kids [\n", count); |
578 | objtext(node, buf); |
579 | |
580 | if (count > TREE_BRANCH) { |
581 | int i; |
582 | page_data *thisfirst, *thislast; |
583 | |
584 | page = first; |
585 | |
586 | for (i = 0; i < TREE_BRANCH; i++) { |
587 | int number = (i+1) * count / TREE_BRANCH - i * count / TREE_BRANCH; |
588 | thisfirst = page; |
589 | while (number--) { |
590 | thislast = page; |
591 | page = page->next; |
592 | } |
593 | |
594 | if (thisfirst == thislast) { |
595 | objref(node, (object *)thisfirst->spare); |
596 | objtext((object *)thisfirst->spare, "/Parent "); |
597 | objref((object *)thisfirst->spare, node); |
598 | objtext((object *)thisfirst->spare, "\n"); |
599 | } else { |
600 | object *newnode = new_object(node->list); |
2ff8419e |
601 | make_pages_node(newnode, node, thisfirst, thislast, |
602 | NULL, NULL); |
43341922 |
603 | objref(node, newnode); |
604 | } |
605 | objtext(node, "\n"); |
606 | } |
607 | |
608 | assert(thislast == last || page == NULL); |
609 | |
610 | } else { |
611 | for (page = first; page; page = page->next) { |
612 | objref(node, (object *)page->spare); |
613 | objtext(node, "\n"); |
614 | objtext((object *)page->spare, "/Parent "); |
615 | objref((object *)page->spare, node); |
616 | objtext((object *)page->spare, "\n"); |
617 | if (page == last) |
618 | break; |
619 | } |
620 | } |
621 | |
622 | objtext(node, "]\n"); |
623 | |
624 | if (resources) { |
625 | objtext(node, "/Resources "); |
626 | objref(node, resources); |
627 | objtext(node, "\n"); |
628 | } |
2ff8419e |
629 | if (mediabox) { |
630 | objtext(node, "/MediaBox "); |
631 | objref(node, mediabox); |
632 | objtext(node, "\n"); |
633 | } |
43341922 |
634 | |
635 | objtext(node, ">>\n"); |
636 | } |
f0e51ce1 |
637 | |
638 | /* |
639 | * In text on the page, PDF uses the PostScript font model, which |
640 | * means that glyphs are identified by PS strings and hence font |
641 | * encoding can be managed independently of the supplied encoding |
642 | * of the font. However, in the document outline, the PDF spec |
ce1b04aa |
643 | * encodes in either PDFDocEncoding (a custom superset of |
644 | * ISO-8859-1) or UTF-16BE. |
f0e51ce1 |
645 | */ |
ce1b04aa |
646 | static char *pdf_outline_convert(wchar_t *s, int *len) { |
647 | char *ret; |
648 | |
649 | ret = utoa_careful_dup(s, CS_PDF); |
650 | |
651 | /* |
652 | * Very silly special case: if the returned string begins with |
653 | * FE FF, then the PDF reader will mistake it for a UTF-16BE |
654 | * string. So in this case we give up on PDFDocEncoding and |
655 | * encode it in UTF-16 straight away. |
656 | */ |
657 | if (ret && ret[0] == '\xFE' && ret[1] == '\xFF') { |
658 | sfree(ret); |
659 | ret = NULL; |
f0e51ce1 |
660 | } |
ce1b04aa |
661 | |
662 | if (!ret) { |
663 | ret = utoa_dup_len(s, CS_UTF16BE, len); |
664 | } else { |
665 | *len = strlen(ret); |
f0e51ce1 |
666 | } |
ce1b04aa |
667 | |
668 | return ret; |
f0e51ce1 |
669 | } |
670 | |
f0e51ce1 |
671 | static int make_outline(object *parent, outline_element *items, int n, |
672 | int open) |
673 | { |
674 | int level, totalcount = 0; |
675 | outline_element *itemp; |
676 | object *curr, *prev = NULL, *first = NULL, *last = NULL; |
f0e51ce1 |
677 | |
678 | assert(n > 0); |
679 | |
680 | level = items->level; |
681 | |
682 | while (n > 0) { |
7c8c4239 |
683 | char *title; |
ce1b04aa |
684 | int titlelen; |
f0e51ce1 |
685 | |
686 | /* |
687 | * Here we expect to be sitting on an item at the given |
688 | * level. So we start by constructing an outline entry for |
689 | * that item. |
690 | */ |
691 | assert(items->level == level); |
692 | |
ce1b04aa |
693 | title = pdf_outline_convert(items->pdata->outline_title, &titlelen); |
f0e51ce1 |
694 | |
695 | totalcount++; |
696 | curr = new_object(parent->list); |
697 | if (!first) first = curr; |
698 | last = curr; |
7c8c4239 |
699 | objtext(curr, "<<\n/Title "); |
ce1b04aa |
700 | pdf_string_len(objtext, curr, title, titlelen); |
993ade7a |
701 | sfree(title); |
7c8c4239 |
702 | objtext(curr, "\n/Parent "); |
f0e51ce1 |
703 | objref(curr, parent); |
704 | objtext(curr, "\n/Dest ["); |
be76d597 |
705 | objref(curr, (object *)items->pdata->first->page->spare); |
f0e51ce1 |
706 | objtext(curr, " /XYZ null null null]\n"); |
707 | if (prev) { |
708 | objtext(curr, "/Prev "); |
709 | objref(curr, prev); |
710 | objtext(curr, "\n"); |
711 | |
712 | objtext(prev, "/Next "); |
713 | objref(prev, curr); |
714 | objtext(prev, "\n>>\n"); |
715 | } |
716 | prev = curr; |
717 | |
718 | items++, n--; |
719 | for (itemp = items; itemp < items+n && itemp->level > level; |
720 | itemp++); |
721 | |
722 | if (itemp > items) { |
723 | char buf[80]; |
724 | int count = make_outline(curr, items, itemp - items, FALSE); |
725 | if (!open) |
726 | count = -count; |
727 | else |
728 | totalcount += count; |
729 | sprintf(buf, "/Count %d\n", count); |
730 | objtext(curr, buf); |
731 | } |
732 | |
733 | n -= itemp - items; |
734 | items = itemp; |
735 | } |
736 | objtext(prev, ">>\n"); |
737 | |
738 | assert(first && last); |
739 | objtext(parent, "/First "); |
740 | objref(parent, first); |
741 | objtext(parent, "\n/Last "); |
742 | objref(parent, last); |
743 | objtext(parent, "\n"); |
744 | |
745 | return totalcount; |
746 | } |
09358aa7 |
747 | |
748 | static int pdf_versionid(FILE *fp, word *words) |
749 | { |
750 | int ret; |
751 | |
752 | ret = fprintf(fp, "%% "); |
753 | |
754 | for (; words; words = words->next) { |
755 | char *text; |
756 | int type; |
757 | |
758 | switch (words->type) { |
759 | case word_HyperLink: |
760 | case word_HyperEnd: |
761 | case word_UpperXref: |
762 | case word_LowerXref: |
763 | case word_XrefEnd: |
764 | case word_IndexRef: |
765 | continue; |
766 | } |
767 | |
768 | type = removeattr(words->type); |
769 | |
770 | switch (type) { |
771 | case word_Normal: |
e4ea58f8 |
772 | text = utoa_dup(words->text, CS_ASCII); |
09358aa7 |
773 | break; |
774 | case word_WhiteSpace: |
775 | text = dupstr(" "); |
776 | break; |
777 | case word_Quote: |
778 | text = dupstr("'"); |
779 | break; |
780 | } |
781 | |
782 | fputs(text, fp); |
783 | ret += strlen(text); |
784 | sfree(text); |
785 | } |
786 | |
787 | ret += fprintf(fp, "\n"); |
788 | |
789 | return ret; |
790 | } |
7c8c4239 |
791 | |
ce1b04aa |
792 | static void pdf_string_len(void (*add)(object *, char const *), |
793 | object *o, char const *str, int len) |
7c8c4239 |
794 | { |
795 | char const *p; |
796 | |
797 | add(o, "("); |
ce1b04aa |
798 | for (p = str; len > 0; p++, len--) { |
799 | char c[10]; |
800 | if (*p < ' ' || *p > '~') { |
801 | sprintf(c, "\\%03o", 0xFF & (int)*p); |
802 | } else { |
803 | int n = 0; |
804 | if (*p == '\\' || *p == '(' || *p == ')') |
805 | c[n++] = '\\'; |
806 | c[n++] = *p; |
807 | c[n] = '\0'; |
808 | } |
7c8c4239 |
809 | add(o, c); |
810 | } |
811 | add(o, ")"); |
812 | } |
ce1b04aa |
813 | |
814 | static void pdf_string(void (*add)(object *, char const *), |
815 | object *o, char const *str) |
816 | { |
817 | pdf_string_len(add, o, str, strlen(str)); |
818 | } |